Air tightness testing device for coupler unit

Abstract

The utility model relates to the technical field of coupler unit detection, and particularly discloses a coupler unit air tightness testing device which comprises a rack, a pressure gauge, a control button, an A-type operation air cylinder auxiliary tool, an uncoupling air cylinder auxiliary tool, a main air pipe auxiliary tool, an L-type operation air cylinder auxiliary tool and a shunting device. According to the utility model, through the cooperation of the shunting device and the four air path control valves, the air tightness test can be simultaneously or respectively carried out on four key components, namely the A-type operation air cylinder, the unhooking air cylinder, the main air pipe and the L-type operation air cylinder. The parallel test capability greatly shortens the overall test time, significantly improves the working efficiency of the air tightness test of the coupler unit, is especially suitable for large-scale production or maintenance scenes, can effectively reduce the downtime of equipment, and accelerates the production or maintenance progress.

Description

Technical Field

[0001] This utility model relates to the field of coupler unit testing technology, specifically a device for testing the airtightness of coupler units. Background Technology

[0002] The overhaul of the coupler unit frame includes parts replacement, cleaning, and overall functional testing, with the latter including airtightness testing. Existing simple testing benches have many limitations and shortcomings.

[0003] First, each test can only be conducted on one component for air tightness, resulting in extremely low testing efficiency. For example, it takes one hour to complete the air tightness test of a single coupler component, which greatly extends the testing cycle of the entire coupler unit and increases manpower and time costs.

[0004] Secondly, the existing test bench lacks a pressure gauge, making it impossible to directly determine if a leak has occurred. During testing, soapy water or leak detectors are sprayed onto the component under test, and the presence of bubbles is used to assess its airtightness. While this method accurately detects leaks, the moisture in the soapy water or leak detectors can corrode the component, affecting the quality of the inspection. Long-term use of this method will reduce the lifespan and reliability of the coupler unit components.

[0005] Furthermore, due to the relatively simple structure of existing test benches, it is impossible to conduct overall airtightness testing of the coupler's air circuit system. The overall airtightness testing of the coupler's air circuit system can only be performed on a coupler coupling test bench after the entire coupler has been assembled. If a leak is found in the overall air circuit system, the entire coupler needs to be disassembled and repaired, then reassembled, and the overall airtightness testing process repeated until it passes. This testing method not only increases the complexity and difficulty of the test but also further reduces the overall testing efficiency. Utility Model Content

[0006] In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide a device for testing the airtightness of a coupler unit.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a device for testing the airtightness of a coupler unit, characterized in that...

[0008] The device includes: a frame, a pressure gauge, control buttons, auxiliary fixtures for A-type operating air cylinders, auxiliary fixtures for unhooking air cylinders, auxiliary fixtures for main air ducts, auxiliary fixtures for L-type operating air cylinders, and a flow divider. The A-type operating air cylinder auxiliary fixture, the unhooking air cylinder auxiliary fixture, the main air duct auxiliary fixture, the L-type operating air cylinder auxiliary fixture, and the flow divider are all mounted on the surface of the frame. The flow divider is connected to an external air inlet pipe and has four air path control valves. These four air path control valves are respectively connected to the A-type operating air cylinder, the unhooking air cylinder, the main air duct, and the L-type operating air cylinder. The pressure gauge and the control buttons are both mounted on one side of the flow divider and are connected to the flow divider.

[0009] Main working principle: This device for testing the airtightness of coupler units achieves airtightness testing of different components in the coupler unit, such as the A-type operating air cylinder, uncoupling air cylinder, main air pipe, and L-type operating air cylinder, through the coordinated work of various components. Its specific working principle is as follows:

[0010] First, the external air intake pipe is connected to the diversion device. When the valve on the external air intake pipe is opened or the gas supply system is ensured to be turned on normally, the gas enters the diversion device from the external air source through the air intake pipe.

[0011] The flow divider is equipped with four gas path control valves, which are respectively connected to the A-type operating air cylinder, the unhooking air cylinder, the main air duct, and the L-type operating air cylinder. By controlling the opening and closing of the gas path control valves, the gas entering the flow divider can be distributed to different test gas paths, thereby enabling independent or combined airtightness testing of various components.

[0012] The A-type operating air cylinder auxiliary fixture, uncoupling air cylinder auxiliary fixture, main air pipe auxiliary fixture, and L-type operating air cylinder auxiliary fixture are respectively installed on the frame surface for installing and fixing the corresponding coupler unit components. The A-type operating air cylinder is placed in the A-type operating air cylinder auxiliary fixture, and its structure is used to clamp and fix it in place. Similarly, the uncoupling air cylinder, main air pipe, and L-type operating air cylinder are also placed in their respective auxiliary fixtures for fixing, ensuring that the positions of each component are stable during testing, preventing movement or shaking, and guaranteeing the accuracy of the test.

[0013] The pressure gauge and control button are both installed on one side of the distribution device, with the control button connected to the device. Operators can control the opening and closing of each air path control valve on the distribution device by operating the control button. For example, when performing an airtightness test on the type A controlled air cylinder, the operator presses the corresponding control button to open the air path control valve connected to the type A controlled air cylinder, allowing gas to enter the air path of the type A controlled air cylinder; after the test is completed, the control button is pressed again to close the air path control valve. By controlling different air path control valves, this device can perform independent airtightness tests on individual components, or simultaneously open multiple air path control valves to perform combined airtightness tests on multiple components to meet different testing needs. Simultaneously, pressure gauges are connected to the distribution device, with each pressure gauge corresponding to one air path control valve, used to monitor the air pressure in the corresponding air path in real time. When an air path control valve opens and gas enters the corresponding component's air path, the pressure gauge will display the air pressure value in that air path. During testing, if the tested component is airtight (i.e., there is no gas leakage), the air pressure in the corresponding air path will remain stable, and the pressure gauge reading will not change significantly. If there is a leak in the tested component, gas will escape from the leak point, causing the air pressure in the air path to drop, and the pressure gauge reading will decrease accordingly. By observing the change in the pressure gauge reading, the operator can determine whether the airtightness of the tested component is up to standard.

[0014] In summary, this device for testing the airtightness of coupler units achieves airtightness testing of different components of the coupler unit through the coordinated operation of gas supply and distribution, component installation and fixation, test control and operation, and airtightness detection and judgment. It has the advantages of convenient operation and accurate testing.

[0015] Preferably, the A-type control cylinder auxiliary fixture has first fixing holes on both sides, and the A-type control cylinder auxiliary fixture is connected to the frame through the first fixing holes; the A-type control cylinder auxiliary fixture has a rectangular bayonet for clamping and fixing the A-type control cylinder, and the rectangular bayonet opens upward.

[0016] Preferably, the rectangular bayonet has a first notch on both sides.

[0017] Preferably, the unhooking air cylinder auxiliary tooling is provided with second fixing holes on both sides, and the unhooking air cylinder auxiliary tooling is connected to the frame through the second fixing holes; the unhooking air cylinder auxiliary tooling is provided with an olive-shaped bayonet for clamping and fixing the unhooking air cylinder, and the olive-shaped bayonet opens upward.

[0018] Preferably, the olive-shaped bayonet has a second notch on both sides.

[0019] Preferably, the main duct auxiliary fixture has a third fixing hole on one side, and the main duct auxiliary fixture is connected to the frame through the third fixing hole. The main duct auxiliary fixture includes a base, a side guard, a pressure rod, and a clamp. The base is connected to the frame through the third fixing hole, and the side guard and the clamp are respectively located on both sides of the base. The pressure rod is fixed to the clamp through a screw hole, and the pressure rod faces the side guard. The pressure rod and the side guard clamp and fix the main duct placed in the base.

[0020] Preferably, the L-shaped operating cylinder auxiliary fixture has a fourth fixing hole on both sides, and the L-shaped operating cylinder auxiliary fixture is connected to the frame through the fourth fixing hole; the L-shaped operating cylinder auxiliary fixture has a circular bayonet for clamping and fixing the L-shaped operating cylinder, and the circular bayonet opens upward.

[0021] Preferably, the circular notch has a third notch on both sides.

[0022] Preferably, four pressure gauges and four control buttons are provided, and each pressure gauge and each control button is connected to one of the gas circuit control valves.

[0023] Preferably, the bottom of the frame is provided with casters.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] This invention, through the coordination of a diversion device and four air circuit control valves, can simultaneously or separately perform airtightness tests on four key components: the A-type operating air cylinder, the uncoupling air cylinder, the main air pipe, and the L-type operating air cylinder. This parallel testing capability significantly shortens the overall testing time and greatly improves the efficiency of airtightness testing of the coupler unit. It is particularly suitable for large-scale production or maintenance scenarios, effectively reducing equipment downtime and accelerating production or maintenance progress. Unlike traditional methods, there is no need to frequently change test components and rebuild the test environment. Operators can quickly switch test objects by operating different air circuit control valves through control buttons, simplifying the testing process, reducing operational complexity, and further improving testing efficiency.

[0026] The device is equipped with a pressure gauge that can monitor pressure changes in the corresponding air circuit in real time and accurately. During testing, operators can directly read the pressure gauge readings to accurately determine the airtightness of the tested component. Compared to traditional methods that rely on observing bubbles in soapy water or leak detectors to determine leaks, this pressure change-based detection method is more objective and accurate, avoiding misjudgments caused by human observation errors or environmental factors (such as light, airflow, etc.), and improving the reliability of test results. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a top view of the device used for testing the airtightness of the coupler unit;

[0029] Figure 2 This is a side view of the device used for testing the airtightness of the coupler unit;

[0030] Figure 3 This is a side view of the auxiliary tooling for the main air duct;

[0031] 1. Frame; 2. Pressure gauge; 3. Control button; 4. Auxiliary fixture for A-type operating air cylinder; 40. First fixing hole; 41. Rectangular bayonet; 42. First notch; 5. Auxiliary fixture for unhooking air cylinder; 50. Second fixing hole; 51. Olive-shaped bayonet; 52. Second notch; 6. Auxiliary fixture for main air duct; 60. Third fixing hole; 61. Base; 62. Edge retainer; 63. Pressure rod; 64. Clamp; 7. Auxiliary fixture for L-type operating air cylinder; 70. Fourth fixing hole; 71. Circular bayonet; 72. Third notch; 8. Diverter; 80. Air circuit control valve; 9. Roller. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0034] Example 1

[0035] This embodiment discloses a device for testing the airtightness of a coupler unit. Through the coordinated operation of its components, it enables airtightness testing of different parts of the coupler unit, such as the A-type operating air cylinder, the uncoupling air cylinder, the main air pipe, and the L-type operating air cylinder. Figures 1-3 As shown, it includes a frame 1, a pressure gauge 2, control buttons 3, an A-type operating air cylinder auxiliary fixture 4, an unhooking air cylinder auxiliary fixture 5, a main air duct auxiliary fixture 6, an L-type operating air cylinder auxiliary fixture, and a diversion device.

[0036] First, the external air intake pipe is connected to the diversion device. When the valve on the external air intake pipe is opened or the gas supply system is ensured to be turned on normally, the gas enters the diversion device from the external air source through the air intake pipe.

[0037] The flow divider is equipped with four gas path control valves, which are respectively connected to the A-type operating air cylinder, the unhooking air cylinder, the main air duct, and the L-type operating air cylinder. By controlling the opening and closing of the gas path control valves, the gas entering the flow divider can be distributed to different test gas paths, thereby enabling independent or combined airtightness testing of various components.

[0038] The A-type operating air cylinder auxiliary fixture 4, the uncoupling air cylinder auxiliary fixture 5, the main air pipe auxiliary fixture 6, and the L-type operating air cylinder auxiliary fixture are respectively installed on the surface of the frame 1 for installing and fixing the corresponding coupler unit components. The A-type operating air cylinder is placed in the A-type operating air cylinder auxiliary fixture 4 and clamped and fixed using the structure of the auxiliary fixture; similarly, the uncoupling air cylinder, the main air pipe, and the L-type operating air cylinder are also placed in their respective auxiliary fixtures for fixing, ensuring that the position of each component is stable during the test and that there is no movement or shaking, thus ensuring the accuracy of the test.

[0039] Pressure gauge 2 and control button 3 are both installed on one side of the distribution device, with control button 3 connected to the distribution device. Operators can control the opening and closing of various air path control valves on the distribution device by operating control button 3. For example, when performing an airtightness test on the type A controlled air cylinder, the operator presses the corresponding control button 3 to open the air path control valve connected to the type A controlled air cylinder, allowing gas to enter the air path of the type A controlled air cylinder; after the test is completed, the control button 3 is operated again to close the air path control valve. By controlling different air path control valves, this device can perform independent airtightness tests on various components, or simultaneously open multiple air path control valves to perform joint airtightness tests on multiple components to meet different testing requirements. Meanwhile, pressure gauge 2 is connected to the distribution device, with each pressure gauge 2 corresponding to one air path control valve, used to monitor the air pressure in the corresponding air path in real time. When the air path control valve opens and gas enters the corresponding component's air path, pressure gauge 2 will display the air pressure value in that air path. During the test, if the tested component has good airtightness (i.e., no gas leakage), the air pressure in the corresponding air path will remain stable, and the reading of pressure gauge 2 will not change significantly. If there is a leak in the tested component, gas will escape from the leak point, causing the air pressure in the air path to drop, and the reading of pressure gauge 2 will decrease accordingly. By observing the change in the reading of pressure gauge 2, the operator can determine whether the airtightness of the tested component is qualified.

[0040] In summary, this device for testing the airtightness of coupler units achieves airtightness testing of different components of the coupler unit through the coordinated operation of gas supply and distribution, component installation and fixation, test control and operation, and airtightness detection and judgment. It has the advantages of convenient operation and accurate testing.

[0041] In some optional embodiments, the A-type control cylinder auxiliary fixture 4 is connected to the frame 1 through the first fixing holes 40 on both sides, and is fixed to the frame 1. The A-type control cylinder is placed in the auxiliary fixture with the rectangular bayonet 41 opening upward. The shape of the rectangular bayonet 41 is used to initially clamp the A-type control cylinder and prevent it from moving during testing. At the same time, the connection to the frame 1 through the first fixing holes 40 is convenient and quick to install, saving installation time.

[0042] In some optional embodiments, first notches 42 are provided on both sides of the rectangular bayonet 41. When the A-type control cylinder is inserted into the rectangular bayonet 41, the first notches 42 provide a certain operating space, making it easier for the operator to accurately place the A-type control cylinder into the bayonet. Furthermore, during installation, the first notches 42 will be slightly opened, applying a clamping force to the A-type control cylinder through their own elastic restoring force, making the A-type control cylinder more securely fixed. This also facilitates fine-tuning of the A-type control cylinder by the operator during installation or disassembly.

[0043] In some optional embodiments, the unhooking cylinder auxiliary fixture 5 is connected to the frame 1 via the second fixing holes 50 on both sides, thus securing it to the frame 1. The unhooking cylinder is placed inside the auxiliary fixture, with the olive-shaped bayonet 51 opening upwards. The special shape of the olive-shaped bayonet 51 is used to initially clamp the unhooking cylinder, making it more securely fixed inside the auxiliary fixture, adapting to the shape characteristics of the unhooking cylinder, and ensuring its stability. The connection to the frame 1 via the second fixing holes 50 ensures the stability of the unhooking cylinder auxiliary fixture 5 on the frame 1, thereby ensuring the positional stability of the unhooking cylinder during the testing process.

[0044] In some optional embodiments, second notches 52 are provided on both sides of the olive-shaped bayonet 51. When the unhooking cylinder is placed into the olive-shaped bayonet 51, the second notches 52 provide operating space for the operator, facilitating the insertion of the unhooking cylinder. Simultaneously, during installation, the second notches 52 are slightly opened, using their own elastic restoring force to apply a clamping force to the unhooking cylinder, making the unhooking cylinder more securely fixed. The presence of the notches also makes removal and fine-tuning within the bayonet more convenient.

[0045] In some optional embodiments, the main duct auxiliary fixture 6 is connected to the frame 1 via a third fixing hole 60 on one side, thus fixing it to the frame 1. The main duct is placed on the base, with a flange and a clamp respectively located on both sides of the base. The pressure rod is connected to the clamp via screw holes, with the pressure rod facing the flange. The operator rotates the pressure rod to move it towards the flange, thereby clamping and fixing the main duct placed in the base. The screw hole fixing method allows for flexible adjustment of the clamping force to accommodate main ducts of different specifications, ensuring the stability of the main duct during testing.

[0046] In some optional embodiments, the L-shaped operating cylinder auxiliary fixture is connected to the frame 1 via the fourth fixing holes on both sides, thus securing it to the frame 1. The L-shaped operating cylinder is placed inside the auxiliary fixture with the circular bayonet opening facing upwards, using the shape of the circular bayonet to initially clamp the L-shaped operating cylinder. During installation of the L-shaped operating cylinder, the third notches on both sides of the circular bayonet are slightly opened, producing elastic deformation, thereby applying additional clamping force to the L-shaped operating cylinder, making it more securely fixed inside the auxiliary fixture and preventing it from moving during testing.

[0047] In some optional embodiments, a third notch is provided on both sides of the circular bayonet. When the L-shaped operating cylinder is inserted into the circular bayonet, the third notch provides operating space for the operator, facilitating the insertion of the L-shaped operating cylinder. During installation, the third notch will be slightly opened, applying a clamping force to the L-shaped operating cylinder through its own elastic restoring force, making the L-shaped operating cylinder more securely fixed. The notch also makes removal and position adjustment within the bayonet process more convenient.

[0048] In some optional embodiments, four pressure gauges 2 and four control buttons 3 are provided, each pressure gauge 2 and each control button 3 being connected to a pneumatic control valve. The operator controls the opening and closing of the corresponding pneumatic control valve via the corresponding control button 3, thereby controlling the gas flow into the corresponding coupler unit component's pneumatic circuit. The corresponding pressure gauge 2 monitors the pressure changes in the pneumatic circuit in real time, providing independent monitoring and control for the airtightness test of each component. Each component corresponds to an independent control button 3 and pressure gauge 2, enabling independent testing and control of different components, providing greater operational flexibility and meeting diverse testing needs.

[0049] In some alternative embodiments, rollers are provided at the bottom of the frame 1. When the testing device needs to be moved, the operator can push or pull the device and use the rolling action of the rollers to move the device easily on the ground or other planes.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A device for testing the airtightness of a coupler unit, characterized in that, include: The machine includes a frame, a pressure gauge, control buttons, auxiliary fixtures for A-type operating air cylinders, auxiliary fixtures for unhooking air cylinders, auxiliary fixtures for main air ducts, auxiliary fixtures for L-type operating air cylinders, and a flow divider. The A-type operating air cylinder auxiliary fixture, the unhooking air cylinder auxiliary fixture, the main air duct auxiliary fixture, the L-type operating air cylinder auxiliary fixture, and the flow divider are all mounted on the surface of the frame. The flow divider is connected to an external air inlet pipe and has four air path control valves. These four air path control valves are respectively connected to the A-type operating air cylinder, the unhooking air cylinder, the main air duct, and the L-type operating air cylinder. The pressure gauge and the control buttons are both mounted on one side of the flow divider and are connected to the flow divider.

2. The device for testing the airtightness of a coupler unit according to claim 1, characterized in that, The A-type control cylinder auxiliary fixture has first fixing holes on both sides, and the A-type control cylinder auxiliary fixture is connected to the frame through the first fixing holes; the A-type control cylinder auxiliary fixture has a rectangular bayonet for clamping and fixing the A-type control cylinder, and the rectangular bayonet opens upward.

3. The device for testing the airtightness of a coupler unit according to claim 2, characterized in that, The rectangular bayonet has a first notch on both sides.

4. The device for testing the airtightness of a coupler unit according to claim 1, characterized in that, The unhooking air cylinder auxiliary tooling is provided with second fixing holes on both sides, and the unhooking air cylinder auxiliary tooling is connected to the frame through the second fixing holes; the unhooking air cylinder auxiliary tooling is provided with an olive-shaped bayonet for clamping and fixing the unhooking air cylinder, and the olive-shaped bayonet opens upward.

5. The device for testing the airtightness of a coupler unit according to claim 4, characterized in that, The olive-shaped bayonet has a second notch on both sides.

6. The device for testing the airtightness of a coupler unit according to claim 1, characterized in that, The main duct auxiliary fixture has a third fixing hole on one side, and the main duct auxiliary fixture is connected to the frame through the third fixing hole. The main duct auxiliary fixture includes a base, a side guard, a pressure rod, and a clamp. The base is connected to the frame through the third fixing hole, and the side guard and the clamp are respectively located on both sides of the base. The pressure rod is fixed to the clamp through a screw hole, and the pressure rod faces the side guard. The pressure rod and the side guard clamp and fix the main duct placed in the base.

7. The device for testing the airtightness of a coupler unit according to claim 1, characterized in that, The L-shaped operating cylinder auxiliary fixture has a fourth fixing hole on both sides, and the L-shaped operating cylinder auxiliary fixture is connected to the frame through the fourth fixing hole; the L-shaped operating cylinder auxiliary fixture has a circular bayonet for clamping and fixing the L-shaped operating cylinder, and the circular bayonet opens upward.

8. The device for testing the airtightness of a coupler unit according to claim 7, characterized in that, The circular notch has a third notch on both sides.

9. The device for testing the airtightness of a coupler unit according to claim 1, characterized in that, There are four pressure gauges and four control buttons, and each pressure gauge and each control button is connected to one of the gas circuit control valves.

10. The device for testing the airtightness of a coupler unit according to claim 1, characterized in that, The bottom of the frame is equipped with casters.

Images